Cannot redownload an app from iCloud after deleting it from my iPhone

I have purchased apps and they show on my iCloud but after deleting it from my homepage I am unable to redownload it from the iCloud. After clicking in the cloud icon on the AppStore page it is not installing . It shows it's trying but eventually does not install . Kindly help pls. The above previous answers on this page do not help ..... Pls advise. Thanks